<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="../react18/react.development.js"></script>
    <script src="../react18/react-dom.development.js"></script>
    <script src="../react18/babel.min.js"></script>

</head>

<body>
    <button id="btn">修改vDOM并重新渲染</button>
    <div id="app"></div>

    <script type="text/babel">
        const vDOM = (
            <div>
                <h1>diffing算法</h1>
                <p>very nb</p>
            </div>
        )

        //创建容器 并渲染虚拟DOM
        const root = ReactDOM.createRoot(document.getElementById("app"))
        root.render(vDOM)
        //给按钮绑定点击事件,修改vDOM 重新渲染
        //当点击的时候,发现只有p标签重新渲染,其他元素还在浏览中保留
        const oBtn = document.getElementById("btn")
        oBtn.onclick = function () {
            const vDOM = (
                <div>
                    <h1>diffing算法</h1>
                    <p>超级cool</p>
                </div>

            )
            root.render(vDOM)
        }
    </script>
</body>

</html>